Top-flat-card grinding



(No Model.)

H. MODERMOTT. TOP FLAT CARD GRINDING.

N0. 534,721. Patentedf'eb. 26, 1895.

3 w elvwg WDQN may UNITED STATES PATENT Fries.

HENRY MCDERMOTT, OF NASHUA, NEW HAMPSHIRE.

TdP-FLAT-CARD GRINDING.

EEGIFICATION forming part of Letters Patent No. 534,721, dated February26, 1 895.

Application filed February 20,1894. Serial No. 500,849- (No model.)

To all whom it may concern.-

Be it known that I, HENRY MCDERMOTT, a citizen of the United States,residing at Nashua, in the county of Hillsborough and State of NewHampshire, have made certain new and useful Improvements in Top-Flat-Card Grinders, which improvements are fully set forth and described inthe following specification, reference being had to the accompanyingsheet of drawings, in which Figure 1 is an end elevation of a grinderembodying my invention, the stand which supports the journal bearing ofthe grinderroll being removed. Fig. 2 is a side elevation of the sameparts, with the grinder-roll stand in position. Inasmuch as theoperative parts of my machine are the same at each end of the grinder Ihave thought it necessary to illustrate only one end of the same. Fig. 3is a cross-sectional view on line 0cw of Fig. 2. Fig. 4 is a sectionalview through the upper end of the standard and the plate, e, saidsection being taken upon a line, such as is indicated at 00:1; Fig. 1,which extends through the wider part of said plate.

This invention is in the class of grinders, (used for dressing orleveling up the top-flats of carding machines) which, being attachedpermanently to'the carding machine frame, may be brought into grindingrelation with the top-fiats,or thrown out of operation, at will and mypurpose is to provide simple and cheap mechanism which may be readilycontrolled and quickly adjusted.

In carrying into effect my invention I have dispensed with certaincumbersome levers and weights which have been used, in some instances,heretofore.

Referring now to the drawings, (1 indicates a standard secured to thecarding-machine frame and having bolted to its outer face abracket-stand 17 whose upper end is formed as a journal bearing 1) inwhich the shaft cof the grinding roll 0 revolves. The upper portion ofstandard a is reduced in thickness -(as seen at a in Fig. 2) and isformed with laterally extending arms, or ends, (l -0L whose upper face,or edge, is straight throughout the greater part of its length but whoseends are gradually reduced in height, as shown in Fig. 1, to provideways on which the ends of the top-flats may be successively guided asthey approach the grinding roll 0. Secured to the outer face of thisreduced portion a, by bolts d-d, is abar or plate e whose upper portione projects laterally and overhangs the part a. One half, or thereabout,of this overhanging portion is reduced in thickness (as shown at eFig. 1) to receive a shoe f which is secured in place by screws f, thescrew holes in the shoe being elongated, as in Fig. 1, to permit limitedvertical adjustment of the shoe, said shoe and the overhanging part ofthe bar or plate thus forming a way, composed of two parts which areadjustable together and one of which parts is also adjustableindependently of the other. I do not wish, however, to be understood aslimiting myself to this particular construction of way for limiting theextent of the upward movement of the flats, as any construction of wayhaving the adjustment mentioned may be employed without departing fromthe spirit of the invention, whether the same consists of a shoe and abar or plate, or of other de vices.

WVhen shoefis properly adjusted its lower edge is somewhat below thelower face 6 of the overhanging portion 6' of the plate 6 and,preferably, parallel therewith but not necessarily so, as clearlyindicated in Fig. 1. The end of shoefimmediately beneath the axialcenter of the grinding roll 0 is beveled, as at f so that as thetop-flats travel in the direction indicated by arrow No. 1, said flatsare deflected downward andguided in a direction to grind the properbevel or angle on the ends of the card-teeth and, to vary said angle,

it is only necessary to loosen the screws f and raise or lower the shoef, thus varying its lower level relatively to that of the fixed,overhanging, portion a to which the shoe is clamped.

Whenever the grinding roll 0 becomes worn and reduced in diameter, andit is desired to adjust the plate eand its attached parts, this may bereadily done byloosening the nuts of bolts dd, the openings throughwhich said bolts pass being enlarged to permit lateral adjustment andthe opening of boltsd being also enlarged to permit vertical adjustment.This provision for double adjustment enables the attendant to raise theplate 6 without materially disturbing the end nearest the inclined way aon which the flats first ride as they approach the grinding roll; thebolt d meanwhile serving as a fulcrum upon which the plate 6- may berocked, as well as moved longitudinally.

I preferably drill and tap the plate 6, near the bolt d, and inserttherein a screw 9 whose lower end abuts the top of standard a. When itis desired to adjust plate e vertically it is only necessary to ease thenut of bolt (1' and set up the screw g, when the end of the plate thatbears shoe f will be forced upward or, by unscrewing screw g said shoeand its support may be lowered. It will thus be seen that the plate 6and its attached parts may be adjusted as a whole, either vertically orlongitudinally and that shoe f may be adjusted independently of theplate which supports it.

To force the card-teeth of the top-flats upward, into grinding relationwith roll 0, I have provided a spring -pressed rod h arranged to slidevertically in bearingsiformed as parts of a bracket-frame which isbolted to the standard ct. The upper portion, or head, of the rod h ismade with a laterally extending arm it that is bent downward upon theside from which the top-flats approach the grinder.

It will be seen by reference to Fig. 2 of the drawings that eachtop-flat is formed with an extension m that may engage and ride upon theways a a and also with a heel portion 1% that engages and rides upon thearm 77. of rod h. WVhen the grinder is in operation the rod h is then inits highest position and the top-flat ends m are raised from the ways aa until they engage and ride upon the lower faces of the overhangingportion of plate a and of the shoef. \Vhen, on the other hand, thegrinder is thrown out of operation, the rod h is lowered, permitting theends m of the flats to travel on said ways a a thus allowing thecard-teeth of the flats to pass under the grinder roll without engagingit.

To force the rod h upward I have coiled thereon a spiral spring 12. oneof whose ends abuts the lower bearing 7 The opposite (upper) end of saidspring abuts a nut n screwed upon rod h and said spring seeksconstantly, by reason of its expansive force, to carry the rod upward. Acheck nut "n is also preferably provided to retain nut n in positionafter adjustment. Loosely mounted upon the lower end of rod his a collar0 having an operating handle 0', the lower face of said 001- lar beingformed as a cam 0 that engages a radial pin 71. in the rod h in suchmanner that when the cam-collar is partially rotated the rod is drawndownward, against the force of the spring.

When it is desired to bring the grinder into use itis only necessary torock the cam 0 into the position shown in Fig. 2 when spring n by itseffort to expand, immediately forces the rod h, and top flats supportedthereon, upward.

My described grinding device, as a whole,is

believed to be quite as simple as any in use and maybe quite as readilyadjusted or started into action.

Having described my invention, I claim- 1. In a top flat card grinder,the combination with the grinding roll and its supports, and mechanismfor forcing the flats upward into grinding relation with the roll, of away for limiting theextent of the upward movement of said flats, saidway consisting of two parts which are adjustable together and one ofsaid parts being also adjustable independently of the other,substantially as described.

2. In combination with a grinding roll and supports for the same,spring-pressed rods said shoe and plate being adjustable together 5 andsaid shoe being also independently adjustable on said plate and bothforming a way for-limiting the upward movement of said top flats,substantially as described.

4. In a top flat card grinder, the combination with the grinding roll,and ways for the top flats, of a vertically movable springpressed rodhaving a pin, and a rotatable collar, loosely encircling said rod andhaving a cam engaging said pin, substantially as de- :05-

scribed and for the purposes specified.

HENRY MODERMOTT. \Vitnesses:

O. A. McDERMo'rr, GEORGE H. BARRETT.

